Safety device for power-operated machines.



B.. STONE.

.750i-u POWER OPERATBD MACHINES,

. APPLLMHON FILED 50.9.1913.

SAFETY DEVCE Patented Sept. 2;,

lim/VENTOR.

' BY @Vv/( ATTQRNEY.

UNITED STATES PATENT oEEIoE. i

Emmi; n' sToNE, or NEW n nITAINg'coNNE'cTIcUT, AssIeNon ToTnE maroni nanowar'. conIoRATIoN, or NEW nnITAIN, ooNIfnzzc'rictrxg,'A` CORPORATION or CONNECTICUT.

l:lo vices for preventing accident or injury tov thef rson of an operative in such mac ne my invention belng especial y apA plicable in Preventing 'Ingnry during repeating of the maohlhe: E

'is .one form Q1 device, enmorning"my imei#4 tion endin the leinstructu;n and rue of Y which the objects heremeetfout, afs welljs `others, may be attainedJs Illustrated; mthe accompanying drawings, in whicli-.--v 1 tion of a vmachine embodying my Invention, withparts broken faway show construction.. Fi'g. 2 `is a front vlew of the same. 'Fig 3 is. a detail view illustra-tm the opmi. eration 'ofthefdevice when' themac 'ne repeats." Fig. i iS D, detail view.' showin the v construction and operation of the loc ngdevice, e

e .mlproved safety appliancev is'calcuac lanci? 't0 rmit theoperationsof feedingza mnchineps a drop press, by the niethods heretofore' emgloyed and without, 1n any manner, impe ing the work of the -operative, the device being constructed bo effect ab its purpose only when the machine repoets, that is, when, without the intention of the operator, it performs a secondo era tion, asv by reaeon of non-re1ease o the clutch parte..

co My Improved device is especially applicable in connection with the Safety'apphance forming'the subject matter of my'copendxn a plication filed April th, .1913, .Seri Nlmber 764,592, and to which application reference is hereby made for lnforrnationias to construction andvoperation of parte not embod n the invention asmay not -be clearlyyilllstratedaml describelhereim In theaocompanylng drawings the 111x-,

`no merel 5 indicates thebaseof a machine, that sara-TY D'EvxcE non rownnfornzwrnn :nonnina spenen@ of nam mea. Patented sepa 22, 1914; hinein and negemberf. ma.. sem m. wam.

imp orteV anysuitable manner an upon w ich a frame 6 ie located, this frame eupportmg-a drivingahaft 7 havin la drivmgj pulley 8 mounted thereon V: an

afdle r10of a drop press, all of rwhIc parte may of ordinary-and well known con- ?structlon andwhlch cludea clutch member operatedby a clutch onstartin lever 11 S toconnect thepulley with the sha 7 to ro- Fstood thatalthough a'drop press is -emsloyef'for the, urpose of Illustration and c exscrlptiolzi ofie'invention, the latter isI net neeessarilyhmited to a machine of thisI -knd. `-The` machine also embodies gn'idet i glates 12 for holding-the 4reciprocating mem- B1 ger zone "and -lable toinjury bv movement 10j? the plnnger 9, in vthe form o mechanism herein shown this dog'constituting the end of a slidingba'r 18 mounted, as to it'sv end' able manner, as bymeansiof` 'a bracket 22 having a socket-23 to receive a; frame suport 24 One-endV barf26 of said Supporting ycross bar ifrigidly gatta bar, the edd of t form another endllhar op edjso said end Positel'y di adapted to operate a plunger 9 suporting' tate the latter in a manner common to mal chlnes of thlsclass,and it will be` underto the ber 263 @Bede (Peret'ng ,Sheff 9,11" .is mounted Infthese en bars, and a ydo l -\or plunger m'p'osition. ,The clutch leon a do ,sup ort 19 secured to the side of mounted a sumiortxng'` frameremovnbly attached'tofthe machine fname in anysuit- Y .rame is attacheto 'the sulilort. 24, and the e. roSsb'ar-being bent'to Q Luiers bamboo or other light material and is adapted to rest against and be located immediately in front of or over the arms of the operator so that it Will readily respond to the movements of the operators arms in all din rections and be no substantie-l obstruction to such movement, and the dog 17 will be moved into the path of movement ci the :foot 14 of the lever 11 and prevent operational the machine wheneverthe operators hands are in dangerous positions,

It sometimes happens, in the operation of the machines of this class, that when the 'clutch is operated to connect the pulley 8 15, with the shaft 7 to operate the plunger, for Vone reason or another the clutch parts may y ailpto ydisengage under the influence of the spring; commonly employed for this pur- Y pose, with a result t 20fcontinue to operate or repeat 7 its operation. l This result, however, is liable 'to be unnoticed b the operative until after the Ahands have een placed in the danger zone lto feed the machine, and it is to prevent accident, and et permit'full unrestricted use of the han s at all other times, that the present invention has been devised by me. n accomplishing this end I provide a feeler ,or feelers 29, 80 securedto and projecting from the dog operating bar 2'2", the ends of c these feelersopposite the bar being so located that when the bar is at that limit of its lay toward the plunger the eelers `will vbe ocated under some movable part of the 35, plunger. As herein shown two eelers are lprovided located at opposite sides of the flengthvvise center of the dog operating bar, and in such positionjthat they will pass underneath'the plunger on opposite sides ci 40 the die 10, the eelers in fact being located underneath the edges of the plunger or slide located between the guides composed. of the guide plates l2. From. this construction it will be noted that should the machine repeat 'and should the hands of the operative at this time be placed ina dangerous posi tion, the moving plunger comin in contact withthe ends of the feelers will push the bar 27 away from the machine, and the arms of the operator being always in contact with the bar when in this osition, the hands will be pushed bachwar ly out of the danger `zone. It will be noted that this construction provides a device that will operate onl in case of af'repeat and with the hands o the operative in the danger zone and at the saine time the movements or the person of operative are unrestricted and the feeding of the machine may proceed in subetan- Y tially the same manner as if the safety device were not employed. The term person 1s employed in the speciication and claims herein with its full and proved. a

at the machine willV denoting the body or; any

regular meanin g as the arms, legs, hands,

member thereo feet or the like. V

While I have shown and described herein a preferred form of construction of my imparatus' for accomplishing' "my purpose tns may be departs from to a. greater or lesser degree and yet be within the spirit and intent of the invention, and l do not therefore limit my invention to the exact' construction of mechanism as 'illus trated and described herein. 76

.l claim- 1. In combination with the reciprocating member of a machine, a device locatedin the path of movement of the person of the operative and necessarily moved thereby in the regular operation of feedin the machine, ,a lock to prevent operatlon of the machine, said lock being connected to be op erated by said device, and a feeler connected to said device to be moved into the path 'of 85 movement of said reciprocating member. 'tl/ .2. In combination with the reciprocating" .v member of a machine, a lock to gprevent eration of the machine, a safety device nected'*` with the lock to operate it," said' 90 safetyv device being located 1n front of the arms of the operative in the regular move# ment of feeding. the machine, and a'feeler connectedvviththe safety device to be ro jected into the path of movement of sai reciprocating member in the movement of .sind safety device.

3. 'in combination with the reciprocating member of a machine, a clutch operating lever, "a lock Ato prevent movement*l of the clutch operating lever, 'a safety device connccted with Athe lock to operate it, said safety' device being located in front of and in the path of movement of the arms ofthe operative in the regular movements in feeding the machine, and a feeler connected with said safety device to be projected in the path .of movement of said reciprocating member at each reciprocating movement of ,the safety device.

4. ln combination with the reciprocating member ci" ajmaehine, a lock to prevent operation of the machine,` a safety bar suspended -in front of said reciprocating finember, a connection between said safety bar 4and lock to operate the latter, said safetyv bar being located in front *of and in thel pat of'movement of the arms of the o rative in the regular movements of fee mg the machine, and a eeler connected with said safety bar to be moved thereby into the path of movement .of said reciprocating member. 5.`In combination with the reciprocatin member of a machine, a safety bar su en ed for swinging movement in frontv o said reciprocating member and in front of and actuated by `the arms of the operative in the sa reeproceipg member when the bm: is regular movements of feedmg the machine, at the@ iam-lt o uns movemen nearest the Te a lock to prevent operation oi the maebme, clproeetmg member.

a connection between seid bm: and lock to B, STUNE. operate the' latter', and a. eeler rigidly se- Witnesses.

cured t said safety bar end with ite end f W. La Home.,

projecting into the path of movement of RUTH M. EUREX" 

